<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>

  <body>
    <form>
      <input
        type="file"
        name="avatar"
        accept="image/*"
        placeholder="请选择头像"
      />
      <button>上传文件</button>
    </form>
    <img src="" alt="" class="avatar" style="width: 500px" />
  </body>
  <script src="./axios.js"></script>
  <script>
    const form = document.querySelector('form')
    const avatar = document.querySelector('.avatar')
    form.addEventListener('submit', function (e) {
      e.preventDefault()
      const fd = new FormData(this)
      console.log(fd.get('avatar'))
      axios({
        url: 'http://ajax-api.itheima.net/api/file',
        method: 'POST',
        data: fd,
      }).then(({ data: res }) => {
        console.log(res)
        const url = res.data.url
        avatar.src = url
      })
    })
  </script>
</html>
